| 1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
| 2 | * |
| 3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
| 4 | * |
| 5 | * "Hilbert II" is free software; you can redistribute |
| 6 | * it and/or modify it under the terms of the GNU General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | package org.qedeq.kernel.se.dto.module; |
| 17 | |
| 18 | import org.qedeq.base.utility.EqualsUtility; |
| 19 | import org.qedeq.kernel.se.base.list.Element; |
| 20 | import org.qedeq.kernel.se.base.module.Term; |
| 21 | |
| 22 | |
| 23 | /** |
| 24 | * Wraps a term. Such an object is build out of |
| 25 | * {@link org.qedeq.kernel.se.base.list.Element}s. |
| 26 | * |
| 27 | * @author Michael Meyling |
| 28 | */ |
| 29 | public class TermVo implements Term { |
| 30 | |
| 31 | /** Formula or term. */ |
| 32 | private Element element; |
| 33 | |
| 34 | /** |
| 35 | * Constructs a term. |
| 36 | * |
| 37 | * @param element Element that should be a term. |
| 38 | */ |
| 39 | public TermVo(final Element element) { |
| 40 | this.element = element; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Empty constructor. |
| 45 | */ |
| 46 | public TermVo() { |
| 47 | // nothing to do |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Set term. |
| 52 | * |
| 53 | * @param element Term. |
| 54 | */ |
| 55 | public final void setElement(final Element element) { |
| 56 | this.element = element; |
| 57 | } |
| 58 | |
| 59 | public final Element getElement() { |
| 60 | return element; |
| 61 | } |
| 62 | |
| 63 | public boolean equals(final Object obj) { |
| 64 | if (!(obj instanceof TermVo)) { |
| 65 | return false; |
| 66 | } |
| 67 | final TermVo other = (TermVo) obj; |
| 68 | return EqualsUtility.equals(getElement(), other.getElement()); |
| 69 | } |
| 70 | |
| 71 | public int hashCode() { |
| 72 | return (getElement() != null ? getElement().hashCode() : 0); |
| 73 | } |
| 74 | |
| 75 | public String toString() { |
| 76 | if (getElement() != null) { |
| 77 | return getElement().toString(); |
| 78 | } |
| 79 | return ""; |
| 80 | } |
| 81 | |
| 82 | } |